Dust-collector.



5.3. DRAVER. DUST COLLECTOR.

APPLICATION FILED MAR. 13', 1902.

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No. 721,360. PATENTED FEB.24,1903.

E. R. DRAVER.

DUST COLLECTOR.

APPLICATION FILED MAR. 13, 1902.

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PATENTED FEB. 24, 1903. E. R. DRAVER. DUST COLLECTOR. APPLICATION FILED MAR. 13, 1902.

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E. RVDRAVER. v DUST COLLECTOR.

APPLIOATION FILED MAR. 13, 1902'.

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PATENTED FEB. 24, 1903. E. R. DRAVBR. DUST COLLECTOR. APPLICATION FILED MAR. 13, 1902.

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UNITED STATES PATENT OFFICE.

EMIL R. DRAVER, OF RICHMOND," INDIANA.

DUST-COLLECTOR.

FPEOIEIOATION forming part of Letters Patent No.- 721,360, dated February 24, -1903. Applicationfiled MarchlB, 1902. Serial No. 98,040. (No model.)

lie it known that I, EMIL R. DRAVER, a citizen oi the UuitedStates, residing at Richmond, in the county of Wayne and State of Indiana, have invented certain new and usei'ui Improvements in Dust-Collectors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it :ippertains to make and use the same.

My invention relates to dust-collectors of the balloon type, and has for its object to provide certain improvements therein with a view of securing increased efiieieucy.

To this end my invention consists of the novel devices and combinations of devices tions. v

To a pair of cross-ties or base-plates 1 are fixed a pair of'frame-plates 2.

hereinafter described, and defined in the claims. I

The invention is illustrated in the accompanying drawings, wherein like notations refer to like parts. throughout the several views.

In said drawings, Figure 1 is an end eleva Lion showing myimproved dust-collector with some parts broken away. Fig. 2 is a'. rightside elevation with respect to Fig. 1, with some parts removed and others broken away. Fig. 3 is a longitudinal central vertical sec- .tion on the irregular line 00 m of Fig. 4.. Fig.

. is afcrosssootion through a part of the maclnne on tl1elinowr of Fig. 3. Fig. 5 is a similar cross-section on the line .23 m of Fig.

3. Fig. 6 is a detail in elevation, showing the relation of the cleaner to one of the filtering-' pockets. Fig. 7 is a detail showing part'of the devices for imparting an intermittent rotary motion to the drum.- Fig. 8 is a plan view or detail showing means for supporting and op-' erating the cleaning device with some parts removed and others shown in section. Fig.

9 is a side el vation of the parts shown in Fig.

Fig. 10 is a view in cross-section on the line'nor of Fig. 12. Fig. 11 is asimilar view on the line m w of Fig. 12, and'Fig. 12 is a view on the irregular line 1: w -of Fig. 1 0. Said Figs. l0, l1, and 12 illustrate modifica- The frameplates 2 are of circular form in their upper portion and are provided with inwardly-extended shouldered annular flanges 3 of suitable form to afford the fixed bearings for the .are spaced apart-from eae'hother. .cessiv'e pairs of stretcher-strips are spaced outward to points beyond the periphery of the reel. Annular castingsfi, of angular form in cross-section, constitute the hubs of the reel, i

and the horizontal portions thereof turn on the fixed bearings 3. To the hub 6 are fixed radial spokes or end pieces 7'of truncated sec tor form and properly spaced apart from each other. To the spokes 7 are fixed the filteringframes proper, which, as shown, are made up of end pieces 8, outer end stretcher-strips 9,

inner end stretcher-strips 10, partitions 11, and the filtering-cloths l2, properly stretched over the framesmade'up of the parts 8, 9, 10, and 11, as best shown in Figs. 3, 4, 5, and 6. The inner end pair 10 of the stretcher-strips are placed directly adjacent to each other, while theouter end pair of stretcher-strips 9 The sucapart from each othercircumferentiaily of the reel. Hencewhen the parts are all in Working posit-ion the filtering-frames will be closed at their outer ends and open at their inner ends between the successive pairs or sets of inner stretcher-strips 10.

' The reel made up-of the hubs- 6, radial arms or spokes '7, and the filtering-frames, just hereinbefore described, turns on the annular flanges 3 of the fixed frame-plates 2, and the upperor circular portions of said frame-plates constitute fixed closures to'the central chamher A, surrounding the axis of the'drum. The dust-laden air is admitted to this central chamber A under pressure through'an airtrunk 13, which taps'or extends through one of said frame-plates 2. p I

In the frame-brackets 4 are mounted a main driving-shaft 14, provided witha driving-pulley 15, a pinion 16, and a pair of beveled gears 11, and a sprocket-wheel 18. In said brackets 4: is also mounted a countershaft 19, provided with a gear 20 inmesh with the pinion-l6 on the main shaft 14. and also provided with a pair of eccentric earns 21 and a pair of crank-disks 22, all as best shown in Figs. 1 and 2. Thecrank-disks 22 have pins 23 for operating hook-ended pawls, or rods 24, the hook ends of which engage with teeth 25 on thehub 6'of the rotary reel; The

.twl-rods 24 are properly shaped to afford rectangular strap-sections 24, which embrace the counter-shaft 19 and the pins 23 of the crank-disk 22. Hence under the rotary motion of the counter-shaft 19 the pins 23 will first move the pawl-rods 2t in one direction and then in another, much like an eccentric, thereby rotating the reel with an intermittent or step-by-step motion. The reel has as many teeth 25 on its hub 6 as it has filter ing-fraznes or spokes 7, and the throw imparted oy the pawl-rods 24. is sufficient to bring one filtering frame or pocket after the other into cleaning position, as will later appear.

To the main shaft 14 are pivoted a pair of angular bearingbrackets 26, the vertical arms of which have broadened or expanded faces which rest or bear against the earns 21, carried by the con liter-shaft 19, as best shown in Figs. 1 and 2. the angnlarbearirig-brackets 26 are mounted shafts 27, provided with beveled pinions 28, which engage with the beveled gear 17, carried by the main shaft 14. The shafts 27 are free to slide each in its beveled pinion 28, while connected thereto for rotation there'by. Otherwise stated, the shafts .37 are shown as provided with grooves 71, and the hubs of the beveled pinions 28 are provided with setscrews 1), the inner ends of which engage with the grooves Z) and the shafts 27, as best shown in Figs. 8 and 9.

The shafts 27 are provided with yokes 2.) of proper shape to overarch eccentrics 30, fixed to the inner ends of the shafts 27, as best shown in Figs. 1 and 0. The yokes 29 are provided with pins 31, which work in the slotted guide-brackets 5, as best shown in Figs. 1 and 8. In the outer ends of the )OkOS 29 is mounted the cleaner-shaft 32, which has fixed thereto a series of loop-like heaters 325, composed of leather or other comparatively stifi but slightly-flexible material. To the shaft 32 are fixed open or incomplete eccentric-straps 3;, which embrace the eccentrics 30 on the ends of theshafts 27. llence under the rotary motion imparted by the shafts 27 the cleaner-shaft 32, with its loops 33, will receive a rocking motion under the action of the eccentrics 30 and the straps 34. The parts are so proportioned that when any given set of pockets or filtering-tubes are in cleaning position and the reel is standing stationary the cleaner-shaft 32 will extend between the walls of two adjacent pockets, as is obvious from an inspection of Figs. 1 and 6. The cleaner-will also during said time receive a bodily vertical movement under the action of the cams '21 on the counter-shaft 19 in a manner which may best be understood from an inspection of Figs. land 2. The bearingbrackets 26 being pivoted on the main shaft 14, it is obvious that under the rotation of the counter-shaft 19 the cams 21 will impart an angular motion to the brackets 26, and there-.

by move the yokes 29 and all the parts car- In the horizontal arms of 1 tween two adjacent filtering-pockets and will finally be lifted to a point completely above the reel and into guide-keepers 35, properly supported from an overhanging arm or projecting parts of the brackets 5. The sliding of the shafts 27 in the hubs of the pinions 28 permits the right-line vertical motion of the yokes 29 and the cleaner'shaft 32,while the bearingbrackets 26 move in the arc ofa circle under the action of the cams 21 on the counter-shaft 19. It is of course obvious that the weight of the parts carried by the bearing-brackets 26 tends to bring the same always into a lowermost position as rapidly as permitted by the cams 21.

In the highest part of the central chamber A and fixed to the frame-plates 2 is located a cut-off deck 36, a back-draft chamber 37, and a collecting-trough 38. The back-draft chamber 37 is provided with aconveyer 37 for conducting off any material which may accumulate therein toa deliveryspout 37". The collecting-chamber 38 is' provided with a similar conveyor 3S for conducting off the dust 001-. 5 lected therein to a similar elf-leading chute 38". Both of said conveyors are driven from the sprocket 18 on the main shaft 14 by chain 3.), engaging sprockets 37 and 38 on said conveyer-shafts, as best shown in Fig. 1.

The deck 36 entirely overt-caches and closes the back-draft chamber 37 and partly overreaches and partly closes the collecting-chamber 38. The deck 36 is of the proper shape and location to make when properly packed 105 a close joint. with the inner end stretcherstrip-s10 and the hubs '0 of the rotary reel, and thereby cut off the blast from the inner ends or months of such of the filtering-pockets as may be directly over the said deck 36. no

The partitions 11 in the filtering-frames are provided with air-passages 11 near their outer ends and cooperate with the end pieces 8 to afford passages or compartments 11 which are open at their lower end and are [15 adapted to register with openings 11 in that portion of the deck 36 which covers the backdraft chamber 37,'as may be best seen in Fig. 3.

A tube (not shown) taps the back-draft 12o chamber 37 at the point or nipple 40 and leads either back to the eye of the main fan, which supplies the dnst-laden air under pressure, or to a small fan independent of the main fan, properly located and used for that pur- 125 pose only.

With the construction above described theaction in respect to the back-draft chamber andthe coilecting-chambers and the deck 36 is as follows: When the filtering-pockets are 1 0 brought into cleaning position, the reel is of course stationary, as before stated. Two sets of pockets willthen stand directly over that part of the deck 36 which overlies the backchamber 37.

draftchamber 37,and the blast and dust-laden air from the central chamber'A will be entirely cut off from the mouths of the said pockets; but as "the back-draf t passage 11 in the filtering framesor pockets will then be inregistration with the corresponding openings 11 in the back-draft chamber 37 a back draft will be produced on the filtering-pockets by the fan, (not shown,.) which is piped or connected to the nipple 40 of the back-draft This of course will pull back clean air from the atmosphere, through the filtering-cloths 12 in a direction reversely to' ing the same under the rocking motion of said parts and striking the whole of the same under the bodily or np-and-down traveling motion of the cleaner. As the result of the back draft and the beating and cleaning ac-v tion from the cleaner, the dust will be thoroughly shaken out fromthe filtering-cloths and will fall onto the deck 36. Then under the next step ofthe reels motion the dust which has fallen onto the deck 36 will be scraped off by the inner sets of stretcher-strips 10 and be forced into the open mouth of the collecting-trough 38. These actions occur in succession in respect-to succeeding sets 'of filtering-pockets, and in this way the pockets are kept thoroughly clean.

It should be especially noted that in this machine the backdraft is not applied to the collecting-trough 3S. \Vith equalemphasis it should be noted that the dust which is knocked out from the filtering-pockets does not fall into the back-d raft chamber 37. The

riphery of the rotary r.eel,-as hitherto noted,

by the upward movement of the bearing. brackets 26 under the actions of the cams 21.

-The cleaner-shaft 32, with its loops 33, will then enter the staple-like guide-keepers 35 until the drum or reel receives its next step of motion. By providing these staple-like guides 35 the proper entrance of the loops 33 of the cleaner into the spaces between the pockets is assured when, the cleaner is low ered into working position. 'lvithout the guides 35 the loops 33 might strike the heads of the filtering-frames and cut or wear out the cloths.

It is of course obvious that the invention herein disclosedis capable of modification in of substantially rigid material.

construction without departing from the.

spirit of the invention.

.One obvious modification is illustrated in Figs. 10, 11, and 12. In that modification the dust shaken outfrom the filteringtubes when 'in cleaning position falls directly into thed ust-eollecting chamber 38 instead of onto the ledge or deck 36, as shown in the'main views. For thus modifying the action a deck 4,1 is made of the properconstruction to afford the necessary cut-oft flanges at its oppo-' site sides, while leaving a central opening in the deck, through which' the dust may fall onto an inclined top piece 42, which covers the back-draft chamber 37, but delivers into the open upper end of the collecting-trough 38.. Thecollecting-trough 38 is also provided with short covers 43 near its ends, reversely inclined and leading to the openings 11 of the back-draft. chamber 37, thus permitting the communication between the back-draft chamber 37 andthe back-draft passages 11, in the filtering-pockets. Hence the back draft will act on the pockets as before; but the dust shaken out from the pockets will fall directly into the collecting-chamber 38. The cleaner would act exactly the same as in the main views.

elastic or rigid, will scrape and wear out the cloth of the collecting-pockets.- Moreover, a rotary cleaner, if elastic or flexible, will 'wind around the's'haft and become useless.

A rotary'cleaner, whether rigid or flexible, will have a pasting action on the stock, rubhing the same into the cloth, and thereby rendering that portion of the cloth useless for .which is loosened upby the cleaner from-the adjacent'side o'f'the'pocket to'the opposite side of the-pocketand cause the same to IIC lodge thereon,'thereby reloading and over-' loading one side ot-thdpocket, instead of assisting in the clean ing action, as is sometimes assumed. Arockin'gcleaner simply strikes the cloth with a hammer-like blow and has no scraping or wearing action on the cloth, no pasting action. is produced on the stock, and there is no tendency to wind around the shaft,and can be made and is preferably made It is relatively stiff or rigid, but may be slightly flexible or yielding, as hitherto stated, being composed of loop-like heaters formed of comparatively stiff leather. A rocking cleaner does not set up any current of air. It does not have a fan-like action', and hence there is no current of air forced by the rocking cleaner back through any wall of the pocket. The injurious effects due to the fan-like action of ters Patent of the United States, is as follows:

1. In a dust-collector, thecombination with a rotary reel having a series of filtering-pockets spaced apart from each other,of a rocking cleaner mounted to work in the spaces between adjacent pockets, for action on the cloth with a hammer-like blow, means for bodily moving the cleaner radiallyin respect to said reel, to clean, the walls of said pockets, and to a point above the pockets, for clearing the reel, and an eccentric for imparting the rocking motion to the cleaner, which eccentric moves radially with the cleaner, at all points of the eleaners travel, substantially as described.

2. In a dust-collector, the combination with .a rotary reel having a series of filtering-pockets spaced apart from each other, of a rocking cleaner mounted to rock in the space between adjacent pockets, means for rocking said cleaner to cause the same to strike the walls of the pockets, a lifting device for bodily moving said cleaner on a radial line between the pockets and to a point above the outer ends of the pockets, and overhanging guides for the heaters of the cleaner adapted to receive said boaters, when above the pockets and to guide the same back into workingpositiou between the pockets, 7 which beaterguides are independent of the guides for the cleaner-shaft and the lifting device, substantially as described.

3. In a dust-collector, the combination with a rotary reel having a series of filtering-pockets spacedapart from each other, of a main shaft, a pair of bearing-brackets pivoted to said main shaft, a counter shaft driven from said main shaft and having cams operative to angularly adjust said brackets, sliding shafts mounted on said bearing-brackets and geared to said main shaft, eccentrics on the end of said sliding shafts, yokes 29 on said cleaner-shaft 32 mounted in said yokes 29 and provided with the open or incomplete eccen-- trio-straps 3i engaging said eccentrics, and guides for said yokes 29, all for cooperation, substantially as described.

4. In a dust-collector of the balloon type, the combination with fixed bearing-heads,' of a rotary reel having filtering-pockets mounted to turn on said heads and cooperating therewith to afford a central chamber, surrounding the axis of the drum, into which the dustladen air is forced, under pressure, a cut-off device operative to out off the dust-laden blast from the pockets in cleaning position, a collecting-trough for receiving the dust which is shaken out from the pockets, means for shaking the pockets from which the blast is cut off, and a back-draft chamber in communication with the pockets fromwhich the blast is cut off and when subject to such shaking action, which back-draft chamber and which collecting-trough are independent of each other, substantially as described.

5. In a balloon dust-collector, the combination with stationary heads, of a rotary reel having filtering pockets, which reel is mounted to turn on said heads and cooperates therewith to alfo'rd a central chamber sur rounding the axis of the drum into which the dust-laden air is forced under pressure, an imperforate cut-off deck within said central chamber operative to out off the blast from the pockets above the deck and to receive the dust shaken out from the pockets in cleaning position, means for shaking the pockets from which the blastis cut off, a back-draft chamber beneath said deck,'a dust-collector trough, and channels connecting said back draft chamber with pockets from which the blast is cut off, which back-draft chamber and connecting-channels are independent of the dustcollecting trough, and which trough is independent of the back-draft devices and is operative to receive the dust from said cut-off deck under the next forward step of the reels rotary motion, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

. EMIL R. DRAVER.

Witnesses:

HENRY C. DRAVER, LoIs M. HENLEY. 

